tassel vs adornment

tassel and adornment both are nouns.

Word	Noun	Adjective	Verb	Adverb
tassel	Yes	No	No	No
adornment	Yes	No	No	No

As nouns, adornment is a hypernym of tassel; that is, adornment is a word with a broader meaning than tassel:

tassel: adornment consisting of a bunch of cords fastened at one end
adornment: a decoration of color or interest that is added to relieve plainness

tassel (noun)	adornment (noun)
adornment consisting of a bunch of cords fastened at one end	the action of decorating yourself with something colorful and interesting
	a decoration of color or interest that is added to relieve plainness